Late night MBTA service is finally here. The T is extending service hours on the weekends, starting tonight.

Currently the T ends service at 1 a.m. With the new late-night service, the T will run its most popular bus routes and all subway trains until 3 a.m. on Saturdays and Sundays, according to the MBTA.

Late-night service will be available on every line including Mattapan, and Silver Line (except the SL2). The bus routes that will operate late-night hours are: 1, 15, 22, 23, 28, 32, 39, 57, 66, 71, 73, 77, 111, and 116/117. The RIDE service will also operate until 3 a.m. to areas within 3/4 miles of all late-night services.

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MBTA General Manager Beverly Scott and MBTA Chief Operating Officer Sean McCarthy will be at the Park Street Green and Red Line station early Saturday morning (between 1 a.m.—2 a.m.) to help kick off the late-night service.